Systematic Theology 5 — The Authority Of The Scripture 1

All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work 2 Tim. 3 vs 16–17

There is a question every generation of the Church must answer, not merely in theology textbooks or seminary classrooms, but in the daily, lived reality of faith: Who has the final word?

When tradition says one thing and Scripture says another, which gives way? When a council has ruled, a respected pastor has spoken, or centuries of institutional teaching stand behind a doctrine, but the Word of God contradicts it — what do you do?

The Protestant Reformation

The Protestant Reformation of the 16th century was, at its core, the moment the Church was forced to answer that question out loud. And the answer the Reformers gave is one we cannot afford to forget. By the 16th century, the Roman Catholic Church had constructed a theological framework in which Scripture and tradition held equal authority, mediated through the hierarchy of the Church and ultimately through the Pope.

This was not merely a matter of administration. It was a doctrine. Papal authority — called Petrine primacy — taught that the Bishop of Rome, as successor to the Apostle Peter, held supreme jurisdiction over the entire Church. The scriptural grounding rested primarily on Matthew 16:18–19, where Jesus says to Simon Peter: “You are Peter, and on this rock I will build my Church… I will give you the keys of the kingdom of heaven.” Catholics interpret the “keys” as governing authority, inherited through successive Bishops of Rome. Two further texts reinforced this: Luke 22:32 — “Strengthen your brothers” — and John 21:15–17 — “Feed my sheep” — in which Jesus entrusts the care of the flock to Peter with unmistakable, repeated emphasis.

The controversy that ignited the Reformation began with a doctrine called indulgences. In Catholic theology, an indulgence is the remission of temporal punishment due to sin. Catholic teaching distinguishes between two consequences of sin: the guilt of sin, which was addressed through confession, and the temporal punishment sin causes to the soul, which must still be repaired even after the guilt is forgiven. The Church teaches that Christ’s sacrifice, together with the merits of Mary and the saints, forms a “treasury” of spiritual merit that the Pope, as head of the Church, can draw from and distribute to the members.

Indulgences came in two forms. The first is a plenary indulgence, which involves sacramental confession, reception of the Eucharist (Holy Communion), prayer for the Pope’s intentions, and complete detachment from sin. A partial indulgence removes some. These benefits could be applied not only to the living but also offered on behalf of souls in Purgatory. Purgatory is the state of purification after death, where souls not yet fully purified are cleansed before entering Heaven.

The doctrine was contested. But what drove Martin Luther to action was something more immediate: by 1517, indulgences were being sold. For financial contributions, with papal sanction, people were purchasing remission of punishment for themselves and for their deceased loved ones. Luther, an Augustinian monk who had wrestled deeply and personally with the question of how a sinful person stands justified before a holy God, found this unconscionable.

On October 31, 1517, he nailed his Ninety-Five Theses to the door of the Castle Church in Wittenberg. What began as an academic theological protest became a firestorm. Through careful maneuvering, Luther’s opponents forced him at the Leipzig Debate of 1519 to admit openly that his views contradicted decisions of prior Church councils and statements of former popes. They expected him to recant. Instead, Luther held his ground and pressed the logic forward: if councils could err, and popes could err, then neither could occupy the seat of final authority for Christian doctrine. Only Scripture could hold that position.

Sola Scriptura — Scripture Alone

From that crisis came the defining theological confession of the Reformation: Sola Scriptura — “Scripture alone.” Beloved, it is worth understanding precisely what this meant because it is still misread today, both by those who embrace it carelessly and by those who dismiss it too quickly. Luther did not argue that the Church had no authority. He did not dismiss the historic councils of Nicaea and Chalcedon or claim that the accumulated wisdom of Church tradition was worthless. His argument was more specific and more decisive: no human authority — not a council, not a pope, not a theologian — occupies the same level of authority as Scripture. When any tradition of the Church conflicts with the plain Word of God, the Word must win.

The Sufficiency of the Word

Paul’s words to Timothy in 2 Tim. 3 vs 16–17 is foundational to the Christian faith. All Scripture is given by inspiration of God; inspiration here means** **theopneustos in the Greek: God-breathed, exhaled from the very being of God. Not human wisdom dressed in religious language. Not the best of human spiritual reflection. The very breath of God, committed to writing.

And it is profitable:

• For doctrine — the establishing of what we believe
• For reproof — the confronting of error, even cherished error
• For correction — the resetting of paths that have gone wrong
• For instruction in righteousness — the ongoing formation of a life that honours God

That the man or woman of God may be complete and thoroughly equipped for every good work.

This is the claim that stood at the centre of the Reformation. Not that the Bible is one source among many. Not that it is the most important voice in a conversation that includes tradition, councils, and ecclesiastical authority. But that it is sufficient and that in it, God has given us everything we need to know Him, obey Him, and be formed into the likeness of His Son.

How This Applies To Us

Every time we treat the words of men as beyond scrutiny, we replicate the very structures the Reformers dismantled. Every time we allow church tradition — however ancient, however revered — to override the plain testimony of Scripture, we are back in Leipzig. Every time we build our confidence on the prestige of an institution rather than the foundation of the Word, we are trusting in exactly what Luther refused to trust.

Sola Scriptura is not a slogan for controversy. It is a posture of surrender; the daily choice to bring every teaching, every tradition, every doctrine, every word spoken from every pulpit back to the one standard that cannot err, cannot be corrupted, and will not pass away.

Jesus said it plainly: “Heaven and earth will pass away, but My words will by no means pass away” (Matthew 24:35).

May we love the Scripture with that same clarity. May we hold it with that same conviction. And may we never mistake the voice of men, however authoritative, however ancient, for the voice of God.